What is a sgpx?

SGPX (Super Guppy Payload eXtender) is an external saddlebag-like structure that can be attached to the Super Guppy aircraft. It provides additional cargo capacity and is used to transport oversized or irregularly shaped cargo that cannot fit inside the aircraft's main cargo hold. The SGPX can be easily installed and removed, allowing for more flexibility in terms of cargo transportation. This type of configuration is commonly used by aerospace companies and other organizations involved in transporting large and unconventional freight.